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  1. T

    The JLG 40F Boom Lift Dilemma

    My 40f will spin too if not flat on ground. I swing the engine-counterweight side over drive wheels with boom in and it’s enough to keep drive wheels flat on ground.
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    The JLG 40F Boom Lift Dilemma

    Also a 3/8” belt width
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    The JLG 40F Boom Lift Dilemma

    Mine measures 3 1/2” outside dia
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    The JLG 40F Boom Lift Dilemma

    Thanks for the detailed procedure on how to center the valve for drive motors. Definitely going to try that after I get my voltage problem figured out.
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    The JLG 40F Boom Lift Dilemma

    Thanks again the manuals came through and are helping already. So I have it traced back to the back panel. The wire that heats up the ignition coil on + side and also goes to distributor is causing the voltage drop. Disconnected the distributor wire and voltage is same as battery. It has the...
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    The JLG 40F Boom Lift Dilemma

    Thanks OFF , I’ll see if I can figure out how to send you a pm . You nailed it, I checked and only have 10.2 volts on the yellow wires. I’ve been tracing wires all day and looks like the power is 10.2 coming from the back. The battery is coming in at 14.1 volts with engine running. I’ll keep...
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    The JLG 40F Boom Lift Dilemma

    BTW from reading earlier post I believe I have the Racine valves
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    The JLG 40F Boom Lift Dilemma

    I also have had a problem with the drive motors ever since I owned it. It will drive forward in high and low with ease but reverse always has less moving power and slower in low while high is pretty much useless bogging the engine down and barely moving at all.
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    The JLG 40F Boom Lift Dilemma

    Hi everyone just came across this forum while searching for manuals for my 40f. First I want to say thanks to everyone sharing their time and knowledge on this forum. You are a blessing. I think I have a loose connection somewhere as it’s intermittent. When I raise the boom up it hardly moves...
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